Visual Function in Eyes with Intermediate AMD with and without Retinal Pigment Abnormalities.

2 ), contrast sensitivity did not differ significantly between the eyes with large drusen only (mean, 1.65 ± 0.02) and the eyes with abnormal pigment in addition to large drusen (mean, 1.57 ± 0.03), although the 0.08-log-unit difference in means approached significance ( F = 3.73, P = .06).

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12 However, the 0.14-log-unit difference in mean color confusion score between the two groups observed here did not reach statistical significance perhaps because of the great variation (a nearly 2-log-unit range of values) among the color confusion scores in each group, reflected in the large standard errors (Fig. 3 ).

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